//判断菜单节点是否是末级节点
export default function leafUtils(){
  const setLeaf =(arr) => {
  if(arr && arr.length >0){
  for(let i =0; i < arr.length;i++){
  if(arr[i].children && arr[i].children.length > 0){
  arr[i].open = false;
  setLeaf(arr[i].children)
  }else{
  arr[i].open = true;
  }
  }
  }
  return arr
  }
  return{
  setLeaf
  }
  }